APA (7 वां संस्करण) प्रशस्ति पत्र

Walker, M. P. (2018). Why we sleep: The new science of sleep and dreams. Penguin Books.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Walker, Matthew P. Why We Sleep: The New Science of Sleep and Dreams. UK: Penguin Books, 2018.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Walker, Matthew P. Why We Sleep: The New Science of Sleep and Dreams. Penguin Books, 2018.